Re: [alsa-devel] [PATCH 15/20] ASoC: fsl: make fsl_ssi driver compilable on ARM/IMX

Russell King - ARM Linux wrote:

Is the SCR shared between capture and playback? In that case, what makes this read-modify-write thread safe?

What's "SCR"?

It's not thread-safe on PPC, but then neither is the entire function. You can't have two threads attempt to initialize the hardware at the same time. The macro does not attempt to be atomic, just convenient.